The Collaborative International Dictionary of English v.0.48:

Abearance \A*bear"ance\, n.
   Behavior. [Obs.] --Blackstone.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

ABEARANCE. Behaviour; as, a recognizance to be of good abearance, signifies
to be of good behaviour. 4 Bl. Com.,251, 256.